Attractive little girl reticent (5)
I believe the answer is:
dishy
'attractive' is the definition.
(similar in meaning)
'little girl reticent' is the wordplay.
'little girl' becomes 'di' (short for Diane, Diana etc).
'reticent' becomes 'shy' (I've seen this before).
'di'+'shy'='DISHY'
(Other definitions for dishy that I've seen before include "Fair" , "Good-looking (colloq.)" , "Gorgeous" , "Attractive" , "Handsome" .)